I second that. I get an ear cleaning solution from petmeds because it's convenient to get since I also have to purchase other supplies from there anyway...but peroxide with water worked just the same for me. My male has ear problems, easily prone to infections gotta keep em clean, especially uncropped ears. I can keep my youngest male and my female's ears clean using Macho's method but my oldest male requires his ears to be flushed with solution, it's really particular to your dog's needs.I've diluted a little alcohol with water, I've used peroxide with a little water. I've even used witch hazel. All have done the job. When I was a groomer I would just use the ear cleaning solutions that the pet retail stores carry.